The WaveReef HO-UV sterilizer are ideal for ponds, aquariums and water features. Its userfriendly design has features that allow for quick installation and easy maintenance. WaveReef UV's will clear your water in 3 to 5 days sometimes overnight and keep it that way. It uses high-output T5 UV bulb to ensure efficient performance and compact design so that it doesn't need take up too much space. Compared with normal T5 UV bulb at same power,its length is nearly half. It is designed for the input and output to be hard plumbed with PVC so that it is greatly used for marine hobby. Its maximum Operating Pressure is 30 PSI and comes wiht internal protective quartz sleeve. The UV bulb can adjust its power according the water temperature so as to ensure long life. The whole series of UV sterilzier comes with water-proof smart electronic ballast and the bulb life last upto around 10000 hours.